Hubs and High Fares: Dominance and Market Power in the U.S. Airline Industry
估计了航线和机场支配地位对航空公司市场势力的影响，发现乘客份额显著影响加价能力，但支配地位并未给同市场的小运营商带来明显好处。
This article estimates the importance of route and airport dominance in determining the degree of market power exercised by an airline. The results indicate that an airline's share of passengers on a route and at the endpoint airports significantly influences its ability to mark up price above cost. The high markups of a dominant airline, however, do not create much of an umbrella effect from which carriers with smaller operations in the same markets can benefit. The article suggests a number of possible explanations for this asymmetry.